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October 13, 2027 is a
Wednesday
How to solve:
October 13, 2027
1
Century anchor
2000s
→
Tuesday (2)
Practice →
2
Divide by 12
27 ÷ 12
→
2
Practice →
3
Remainder of 12
27 % 12
→
3
Practice →
4
Divide remainder by 4
3 ÷ 4
→
0
Practice →
5
Year's doomsday
(2 + 2 + 3 + 0) % 7
→
0 → Sunday
Practice →
6
Month doomsday
October
→
10th
Practice →
7
Distance
13 − 10
→
3
Practice →
8
Final answer
(0 + 3) % 7
→
3 → Wednesday
Practice the Doomsday algorithm →